Scattered here and there in the Quran and the Books of Sunna-books in which the Prophet’s authentically-traced-back sayings and speeches are compiled-are numerous future incidents that, according to Muslims beliefs, will inevitably take place in the ordinary course of events before the coming of Doomsday. These Prophetical ahaddieth which bear signs or show plainly presages of the end’s time usually begin with the expressions "The Hour will not occur before ...," or "Before the coming of the Hour...," followed by narrations or hints of a number of future events or, in some cases, natural phenomena, the occurrence of which will give-and has already given, indeed-to people obvious warnings that humankind’s worldly life is nearing its end.